反应详情

To a stirred solution of 3-methyl-6-aminoindazole (2.71 g, 0.015 mol) and NaHCO3 (1.26 g, 0.045 mol) in THF (15 mL) and EtOH (60 mL) was added 5-fluoro-2,4-dichloropyrimidine (3.2 g, 0.019 mol) at room temperature. After the reaction was stirred overnight, the brown suspension was filtered and washed thoroughly with EtOH. The filtrate was concentrated under reduced pressure, and the resulting solid was washed with ether to remove excess pyrimidine to yield 3.7 g of the desired product (89%). HNMR: δ 12.57 (s, 1H), 10.01 (s, 1H), 8.28 (d, 1H), 7.93 (s, 1H), 7.60 (d, 1H), 7.27 (dd, 1H) 3.11 (s, 3H).

1. filtrationthe brown suspension was filtered
2. washwashed thoroughly with EtOH
3. concentrationThe filtrate was concentrated under reduced pressure
4. washthe resulting solid was washed with ether
5. customto remove excess pyrimidine